Coppermind's profile - activity

Hello, I am trying to use cv_camera with an IP camera. I am not sure how to initialize cv_camera such that it can read a cv_camera.

My understanding is that this would be done through setting the 'device_id' parameter. However, when I tried to set it to an http stream, it activated my laptop camera instead.

I did more experimenting and discovered that device_id only worked if it was set to an integer. I thought that the device_id parameter was passed to an instance of Videocapture cap(device_id) but this does not seem to be the case. I tried calling the address of an attached webcam directly '/dev/video1' but that did not work. I experimented with different cv paths as specified here:

http://funvision.blogspot.ca/2017/06/...

but I haven't been able to get anything besides integer inputs to device_id to work.

Any assistance or insight would be appreciated. Thank you for your time.

EDIT: There is another parameter called device_path that is documented on the github page.

Thanks for letting me know, but unfortunately I do not have sufficient karma to accept my own answer.

There is another parameter called device_path that is documented on the github page. This allows you to specify a cv_str

There is another parameter called device_path that is documented on the github page.

There is another parameter called device_path that is documented on the github page. Edit: Unfortunately the green chec

There is another parameter called device_path that is documented on the github page.

How to use cv_camera with IP cameras? Hello, I am trying to use cv_camera with an IP camera. I am not sure how to initia

There is another parameter called device_path that is documented on the github page.

How to force a camera to lower its resolution using parameters? Hello, I am trying to use the parameters of cv_camera to

How to use cv_camera with IP cameras? Hello, I am trying to use cv_camera with an IP camera. I am not sure how to initia

How to use cv_camera with IP cameras? Hello, I am trying to use cv_camera with an IP camera. I am not sure how to initia

Hello, I am a ros newbie that is trying to work with cameras. My question is how can I scale up the use of cv_camera so that I can use multiple cameras at the same time? My understanding is that since cv_camera will try to open the device specified by the device_id parameter, I cannot try to run multiple instances of the node since it will just refer to the same parameter.

Just to test this theory, I tried to run 'rosrun cv_camera cv_camera_node 0' and 'rosrun cv_camera cv_camera_node 1' with two cameras connected, but they just showed the same device. Any insight or advice would be greatly appreciated.

UPDATE: The solution was to use rosrun and specify the device name and a new node name using parameters: e.g. 'rosrun cv_camera cv_camera_node __name:=test _device_id:=1'

How to view multiple cameras using cv_camera? Hello, I am a ros newbie that is trying to work with cameras. My question

Thank you for the response, When I tried to run both commands in separate terminals, the first node stopped working and

How to view multiple cameras using cv_camera? Hello, I am a ros newbie that is trying to work with cameras. My question

Hello, I am working with Ubuntu 16.04 and ros kinetic. I am trying to experiment with Ros QT for designing an interface for my project. I haven't been able to get the rqt command to display the plugins that I have installed.

I am a ROS newbie, so it is plausible that I made a mistake with how I installed rqt, but what I did was that I started with a clean install of Ubuntu 16.04, I followed the instructions listed here: http://wiki.ros.org/kinetic/Installat... and here http://wiki.ros.org/ROS/Tutorials/Ins... to verify ROS was installed correctly.

I then ran the commands

$ sudo apt-get install ros-kinetic-rqt ros-kinetic-rqt-common-plugins

$ sudo apt-get update

$ sudo apt-get dist-upgrade

as instructed here http://wiki.ros.org/rqt/UserGuide/Ins...

When I run the command

$rqt

I only get a blank window with no text.

I tried to verify that I had plugins installed by running

$ rqt --list-plugins

and I do get a populated list, and I can run the 'rqt_image_view' plugin directly from the command line.

My question is why do I not see any options to run plugins from the rqt window? Any insight or advice would be greatly appreciated.

This did turn out to be the issue, thank you for your help.

RQT command does not display plugins after clean install Hello, I am working with Ubuntu 16.04 and ros kinetic. I am try